Hi all, thanks, my findings seem to be theat the transfers and fitment are the same, but no concrete source to confirm it.

@mudnut thats an interesting point you make, this vehicle only does mild off road at best, mostly road touring, so the decreased weight and fuel saving of the 30a box may be better than the strength benefit of the 50b?

Is the 30a safe with 400lbft/540Nm on 32" tyres?